제출 #210441

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
210441		ZwariowanyMarcin	Savrsen (COCI17_savrsen)	C++14	120 / 120	1140 ms	39544 KiB

savrsen

#include <bits/stdc++.h>
#define LL long long
#define LD long double
#define pb push_back
#define mp make_pair
#define ss(x) (int) x.size()
#define fi first
#define se second
#define cat(x) cerr << #x << " = " << x << endl
#define rep2(i, j, n) for (LL i = j; i <= n; ++i)
#define rep(i, j, n) for (int i = j; i <= n; ++i)
#define per(i, j, n) for (int i = n; j <= i; --i)
#define boost cin.tie(0);ios_base::sync_with_stdio(0);
#define all(x) x.begin(), x.end()
#define bignum vector <int>

using namespace std;

const int N = 1e7 + 100;

int a, b;
int sum[N];

int main() {
	scanf ("%d%d", &a, &b);
	rep(i, 1, N / 2)
		for (int j = i + i; j < N; j += i)
			sum[j] += i;
	LL ans = 0;
	rep(i, a, b) ans += abs(i - sum[i]);
	printf ("%lld", ans);
	
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

savrsen.cpp: In function 'int main()':
savrsen.cpp:25:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d%d", &a, &b);
  ~~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 120 / 120